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https://issues.apache.org/jira/browse/HADOOP-8325?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13266946#comment-13266946
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Hudson commented on HADOOP-8325:
--------------------------------
Integrated in Hadoop-Hdfs-trunk-Commit #2248 (See
[https://builds.apache.org/job/Hadoop-Hdfs-trunk-Commit/2248/])
HADOOP-8342. HDFS command fails with exception following merge of
HADOOP-8325 (tucu) (Revision 1333224)
Result = SUCCESS
tucu : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1333224
Files :
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/CHANGES.txt
*
/hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/FileSystem.java
> Add a ShutdownHookManager to be used by different components instead of the
> JVM shutdownhook
> --------------------------------------------------------------------------------------------
>
> Key: HADOOP-8325
> URL: https://issues.apache.org/jira/browse/HADOOP-8325
> Project: Hadoop Common
> Issue Type: Bug
> Components: fs
> Affects Versions: 2.0.0
> Reporter: Alejandro Abdelnur
> Assignee: Alejandro Abdelnur
> Priority: Critical
> Fix For: 2.0.0
>
> Attachments: HADOOP-8325.patch, HADOOP-8325.patch, HADOOP-8325.patch,
> HADOOP-8325.patch, HADOOP-8325.patch, HADOOP-8325.patch, HADOOP-8325.patch,
> HADOOP-8325.patch
>
>
> FileSystem adds a JVM shutdown hook when a filesystem instance is cached.
> MRAppMaster also uses a JVM shutdown hook, among other things, the
> MRAppMaster JVM shutdown hook is used to ensure state are written to HDFS.
> This creates a race condition because each JVM shutdown hook is a separate
> thread and if there are multiple JVM shutdown hooks there is not assurance of
> order of execution, they could even run in parallel.
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